diff options
Diffstat (limited to 'backends/objectstore.py')
| -rw-r--r-- | backends/objectstore.py | 66 |
1 files changed, 40 insertions, 26 deletions
diff --git a/backends/objectstore.py b/backends/objectstore.py index cd051588..2ab07675 100644 --- a/backends/objectstore.py +++ b/backends/objectstore.py @@ -1,9 +1,7 @@ -import uuid from u1db.backends import CommonBackend -from u1db import errors, Document +from u1db import errors, Document, vectorclock from leap.soledad import util as soledadutil - class ObjectStore(CommonBackend): """ A backend for storing u1db data in an object store. @@ -11,12 +9,12 @@ class ObjectStore(CommonBackend): def __init__(self, replica_uid=None): # This initialization method should be called after the connection - # with the database is established, so it can ensure that u1db data is - # configured and up-to-date. + # with the database is established in each implementation, so it can + # ensure that u1db data is configured and up-to-date. self.set_document_factory(Document) self._sync_log = soledadutil.SyncLog() self._transaction_log = soledadutil.TransactionLog() - self._conflict_log = soledadutil.ConflictLog() + self._conflict_log = soledadutil.ConflictLog(self._factory) self._replica_uid = replica_uid self._ensure_u1db_data() @@ -72,8 +70,7 @@ class ObjectStore(CommonBackend): raise errors.RevisionConflict() new_rev = self._allocate_doc_rev(doc.rev) doc.rev = new_rev - self._put_doc(doc) - self._update_gen_and_transaction_log(doc.doc_id) + self._put_and_update_indexes(old_doc, doc) return doc.rev def delete_doc(self, doc): @@ -89,8 +86,7 @@ class ObjectStore(CommonBackend): new_rev = self._allocate_doc_rev(doc.rev) doc.rev = new_rev doc.make_tombstone() - self._put_doc(doc) - self._update_gen_and_transaction_log(doc.doc_id) + self._put_and_update_indexes(old_doc, doc) return new_rev # start of index-related methods: these are not supported by this backend. @@ -117,10 +113,25 @@ class ObjectStore(CommonBackend): # end of index-related methods: these are not supported by this backend. def get_doc_conflicts(self, doc_id): - return [] + self._get_u1db_data() + conflict_docs = self._conflict_log.get_conflicts(doc_id) + if not conflict_docs: + return [] + this_doc = self._get_doc(doc_id) + this_doc.has_conflicts = True + return [this_doc] + list(conflict_docs) def resolve_doc(self, doc, conflicted_doc_revs): - raise NotImplementedError(self.resolve_doc) + cur_doc = self._get_doc(doc.doc_id) + new_rev = self._ensure_maximal_rev(cur_doc.rev, + conflicted_doc_revs) + superseded_revs = set(conflicted_doc_revs) + doc.rev = new_rev + if cur_doc.rev in superseded_revs: + self._put_and_update_indexes(cur_doc, doc) + else: + self._add_conflict(doc.doc_id, new_rev, doc.get_json()) + self._delete_conflicts(doc, superseded_revs) def _get_replica_gen_and_trans_id(self, other_replica_uid): self._get_u1db_data() @@ -142,6 +153,7 @@ class ObjectStore(CommonBackend): other_transaction_id) def _get_transaction_log(self): + self._get_u1db_data() return self._transaction_log.get_transaction_log() #------------------------------------------------------------------------- @@ -157,11 +169,12 @@ class ObjectStore(CommonBackend): return self._transaction_log.get_generation_info() def _has_conflicts(self, doc_id): - # Documents never have conflicts on server. - return False + self._get_u1db_data() + return self._conflict_log.has_conflicts(doc_id) def _put_and_update_indexes(self, old_doc, doc): - # TODO: implement index update + # for now we ignore indexes as this backend is used to store encrypted + # blobs of data in the server. self._put_doc(doc) self._update_gen_and_transaction_log(doc.doc_id) @@ -199,14 +212,7 @@ class ObjectStore(CommonBackend): """ Create u1db data object in store. """ - if self._replica_uid is None: - self._replica_uid = uuid.uuid4().hex - doc = self._factory(doc_id=self.U1DB_DATA_DOC_ID) - doc.content = { 'sync_log' : [], - 'transaction_log' : [], - 'conflict_log' : [], - 'replica_uid' : self._replica_uid } - self._put_doc(doc) + NotImplementedError(self._initialize) def _get_u1db_data(self, u1db_data_doc_id): """ @@ -239,17 +245,19 @@ class ObjectStore(CommonBackend): def _add_conflict(self, doc_id, my_doc_rev, my_content): self._conflict_log.append((doc_id, my_doc_rev, my_content)) + self._set_u1db_data() def _delete_conflicts(self, doc, conflict_revs): deleting = [(doc.doc_id, c_rev) for c_rev in conflict_revs] self._conflict_log.delete_conflicts(deleting) + self._set_u1db_data() doc.has_conflicts = self._has_conflicts(doc.doc_id) def _prune_conflicts(self, doc, doc_vcr): if self._has_conflicts(doc.doc_id): autoresolved = False c_revs_to_prune = [] - for c_doc in self._get_conflicts(doc.doc_id): + for c_doc in self._conflict_log.get_conflicts(doc.doc_id): c_vcr = vectorclock.VectorClockRev(c_doc.rev) if doc_vcr.is_newer(c_vcr): c_revs_to_prune.append(c_doc.rev) @@ -260,5 +268,11 @@ class ObjectStore(CommonBackend): if autoresolved: doc_vcr.increment(self._replica_uid) doc.rev = doc_vcr.as_str() - c = self._db_handle.cursor() - self._delete_conflicts(c, doc, c_revs_to_prune) + self._delete_conflicts(doc, c_revs_to_prune) + + def _force_doc_sync_conflict(self, doc): + my_doc = self._get_doc(doc.doc_id) + self._prune_conflicts(doc, vectorclock.VectorClockRev(doc.rev)) + self._add_conflict(doc.doc_id, my_doc.rev, my_doc.get_json()) + doc.has_conflicts = True + self._put_and_update_indexes(my_doc, doc) |